Question

The probability of having a child with blood group O to parents with blood groups A and B is

• A. 4 out of 4
• B. 3 out of 4
• C. 2 out of 4
• D. 1 out of 4

Answer 1

The correct option is D 1 out of 4

If parents have blood groups A and B, their genotype will be IA i and IB i. Thus, the next generation will have: IA i (A blood group), IA IB (AB blood group), IB i (B blood group), ii (O blood group). Thus there is a chance of one child with O blood group out of 4.